Anestrus
Estrus
Luteinizing Hormone
A major gonadotropin secreted by the adenohypophysis (PITUITARY GLAND, ANTERIOR). Luteinizing hormone regulates steroid production by the interstitial cells of the TESTIS and the OVARY. The preovulatory LUTEINIZING HORMONE surge in females induces OVULATION, and subsequent LUTEINIZATION of the follicle. LUTEINIZING HORMONE consists of two noncovalently linked subunits, alpha and beta. Within a species, the alpha subunit is common in the three pituitary glycoprotein hormones (TSH, LH and FSH), but the beta subunit is unique and confers its biological specificity.
Seasons
Sheep
Progesterone
The major progestational steroid that is secreted primarily by the CORPUS LUTEUM and the PLACENTA. Progesterone acts on the UTERUS, the MAMMARY GLANDS and the BRAIN. It is required in EMBRYO IMPLANTATION; PREGNANCY maintenance, and the development of mammary tissue for MILK production. Progesterone, converted from PREGNENOLONE, also serves as an intermediate in the biosynthesis of GONADAL STEROID HORMONES and adrenal CORTICOSTEROIDS.
Pituitary Hormone-Releasing Hormones
Peptides, natural or synthetic, that stimulate the release of PITUITARY HORMONES. They were first isolated from the extracts of the HYPOTHALAMUS; MEDIAN EMINENCE; PITUITARY STALK; and NEUROHYPOPHYSIS. In addition, some hypophysiotropic hormones control pituitary cell differentiation, cell proliferation, and hormone synthesis. Some can act on more than one pituitary hormone.
Buffaloes
Estradiol
Breeding
Follicle Stimulating Hormone
A major gonadotropin secreted by the adenohypophysis (PITUITARY GLAND, ANTERIOR). Follicle-stimulating hormone stimulates GAMETOGENESIS and the supporting cells such as the ovarian GRANULOSA CELLS, the testicular SERTOLI CELLS, and LEYDIG CELLS. FSH consists of two noncovalently linked subunits, alpha and beta. Within a species, the alpha subunit is common in the three pituitary glycoprotein hormones (TSH, LH, and FSH), but the beta subunit is unique and confers its biological specificity.
Gonadotropin-Releasing Hormone
A decapeptide that stimulates the synthesis and secretion of both pituitary gonadotropins, LUTEINIZING HORMONE and FOLLICLE STIMULATING HORMONE. GnRH is produced by neurons in the septum PREOPTIC AREA of the HYPOTHALAMUS and released into the pituitary portal blood, leading to stimulation of GONADOTROPHS in the ANTERIOR PITUITARY GLAND.
Deer
The family Cervidae of 17 genera and 45 species occurring nearly throughout North America, South America, and Eurasia, on most associated continental islands, and in northern Africa. Wild populations of deer have been established through introduction by people in Cuba, New Guinea, Australia, New Zealand, and other places where the family does not naturally occur. They are slim, long-legged and best characterized by the presence of antlers. Their habitat is forests, swamps, brush country, deserts, and arctic tundra. They are usually good swimmers; some migrate seasonally. (Walker's Mammals of the World, 5th ed, p1362)
Secretory Rate
The amount of a substance secreted by cells or by a specific organ or organism over a given period of time; usually applies to those substances which are formed by glandular tissues and are released by them into biological fluids, e.g., secretory rate of corticosteroids by the adrenal cortex, secretory rate of gastric acid by the gastric mucosa.
Ovarian Follicle
An OOCYTE-containing structure in the cortex of the OVARY. The oocyte is enclosed by a layer of GRANULOSA CELLS providing a nourishing microenvironment (FOLLICULAR FLUID). The number and size of follicles vary depending on the age and reproductive state of the female. The growing follicles are divided into five stages: primary, secondary, tertiary, Graafian, and atretic. Follicular growth and steroidogenesis depend on the presence of GONADOTROPINS.
Ovary
The reproductive organ (GONADS) in female animals. In vertebrates, the ovary contains two functional parts: the OVARIAN FOLLICLE for the production of female germ cells (OOGENESIS); and the endocrine cells (GRANULOSA CELLS; THECA CELLS; and LUTEAL CELLS) for the production of ESTROGENS and PROGESTERONE.
Corpus Luteum
Prolactin
A lactogenic hormone secreted by the adenohypophysis (PITUITARY GLAND, ANTERIOR). It is a polypeptide of approximately 23 kD. Besides its major action on lactation, in some species prolactin exerts effects on reproduction, maternal behavior, fat metabolism, immunomodulation and osmoregulation. Prolactin receptors are present in the mammary gland, hypothalamus, liver, ovary, testis, and prostate.
Gonadotropins, Equine
Gonadotropins secreted by the pituitary or the placenta in horses. This term generally refers to the gonadotropins found in the pregnant mare serum, a rich source of equine CHORIONIC GONADOTROPIN; LUTEINIZING HORMONE; and FOLLICLE STIMULATING HORMONE. Unlike that in humans, the equine LUTEINIZING HORMONE, BETA SUBUNIT is identical to the equine choronic gonadotropin, beta. Equine gonadotropins prepared from pregnant mare serum are used in reproductive studies.
Lactation
Pregnancy
Luteal Phase
Periodicity
Estrous Cycle
Gonadotropins, Pituitary
Hormones secreted by the adenohypophysis (PITUITARY GLAND, ANTERIOR) that stimulate gonadal functions in both males and females. They include FOLLICLE STIMULATING HORMONE that stimulates germ cell maturation (OOGENESIS; SPERMATOGENESIS), and LUTEINIZING HORMONE that stimulates the production of sex steroids (ESTROGENS; PROGESTERONE; ANDROGENS).
Drug Implants
Fertility
Infusion Pumps, Implantable
Implanted fluid propulsion systems with self-contained power source for providing long-term controlled-rate delivery of drugs such as chemotherapeutic agents or analgesics. Delivery rate may be externally controlled or osmotically or peristatically controlled with the aid of transcutaneous monitoring.
Cattle
Bromocriptine
Pregnancy, Animal
Pituitary Gland
Photoperiod
Ovulation Induction
Melatonin
A biogenic amine that is found in animals and plants. In mammals, melatonin is produced by the PINEAL GLAND. Its secretion increases in darkness and decreases during exposure to light. Melatonin is implicated in the regulation of SLEEP, mood, and REPRODUCTION. Melatonin is also an effective antioxidant.
Effects of time of suckling during the solar day on duration of the postpartum anovulatory interval in Brahman x Hereford (F1) cows. (1/254)
Previously published reports have indicated that postpartum anovulatory intervals can be markedly reduced and rebreeding performance enhanced in Bos taurus cows by eliminating nighttime suckling. We sought to confirm this hypothesis by examining the effects of day, nighttime, and ad libitum suckling on suckling behavior of calves, duration of the postpartum anovulatory interval, and pregnancy rates in 45 fall-calving Brahman x Hereford (F1) cows. Beginning on d 9 to 12 postpartum, calves were removed from lactating cows from 0700 to 1900 (Night-Suckled, n = 15) or from 1900 to 0700 (Day-Suckled, n = 15), or remained with their dams continuously (Ad Libitum-Suckled, n = 15). Cows in each group were maintained with fertile Angus bulls from d 10 postpartum until the first normal luteal phase or 100 d postpartum, whichever occurred first. Cows were observed for estrous behavior twice daily, and jugular blood samples were collected twice weekly for the determination of serum progesterone concentration. Mean number of suckling episodes per 24 h was greater (P < .0001) for the Ad Libitum-Suckled group than either Night- or Day-Suckled groups (5.9+/-.42 vs 3.8+/-.14, and 3.9+/-.32, respectively). Hourly analysis of suckling episodes in the Ad Libitum group indicated that they were not skewed toward a particular period, with suckling occurring at a periodicity of 4 to 6 h. Intervals to the first rise in progesterone > or = 1 ng/mL (32+/-2.5, 32+/-4.5, and 31+/-1.7 d, respectively), first normal luteal phase (38+/-3.1, 38+/-3.8, and 37+/-2.5 d, respectively), and first estrus (43+/-3.5, 40+/-3.9, and 36+/-1.1 d, respectively) did not differ (P > .05) among the three groups. Similarly, cumulative pregnancy rates within 100 d after calving did not differ (P > .05). These results in Bos indicus x Bos taurus (F1) cattle do not support the previous conclusions in Bos taurus that eliminating nighttime suckling reduces the postpartum anovulatory interval. (+info)Active immunization with a synthetic fragment of pig inhibin alpha-subunit increases ovulation rate and embryo production in superovulated ewes but season affects its efficiency. (2/254)
Two experiments were designed to determine the effects of active immunization against one of two synthetic peptides from humans (inhibin-like peptide) or pigs (inhibin alpha-subunit) on antibody titres, ovulation rate and embryo production in ewes superovulated with 16 U ovine FSH. In Expt 1, during the breeding season, 30 ewes were subdivided into three groups: group I served as the non-immunized control; group II was immunized against inhibin-like peptide (100 micrograms inhibin-like peptide equivalent, followed by three booster injections); group III was immunized against pig inhibin alpha-subunit conjugated to human serum albumin (96 micrograms for the primary administration and 46 micrograms for the booster). In Expt 2, the efficiency of immunization against pig inhibin alpha-subunit on ovarian response and embryo production was evaluated during the non-breeding season in two groups of ewes (n = 12): group IV was a non-immunized control; Group V was immunized against pig inhibin alpha-subunit. During the breeding season, the ewes immunized against pig inhibin alpha-subunit showed higher antibody titres compared with the group immunized against inhibin-like peptide (P < 0.01) and a significant increase in ovulation rate (12.1) compared with both the control (5.0; P < 0.05) and the inhibin-like peptide-immunized group (3.1; P < 0.01). Immunization against pig inhibin alpha-subunit increased transferable embryo yield 4.5-fold (6.7 versus 1.5; P < 0.01) and improved embryo quality (94.6 versus 40.6%; P < 0.01). During the non-breeding season, immunization against pig inhibin alpha-subunit enhanced ovulation rate from 2.6 in the controls to 9.4 (P < 0.01) but did not affect transferable embryo production (3.9 versus 2.1; P > 0.05) and significantly lowered their quality (54.1 versus 100%; P < 0.01). In conclusion, active immunization against pig inhibin alpha-subunit can improve superovulatory response during the breeding season, while it appears to be unable to increase embryo yield during the seasonal anoestrus. (+info)Oestrogen and progesterone receptor immunoreactivity and c-fos expression in the ovine cervix. (3/254)
Immunocytochemistry was used to detect the presence of oestrogen and progesterone receptors in the cervices of prepubertal lambs, seasonally anoestrous ewes, cyclic ewes, and pregnant ewes of known gestational stages, to define the roles of gonadal steroids in cervical function. The presence of the immediate early gene product, c-Fos, a marker for cellular activation, was also investigated using immunocytochemistry and in situ hybridization. Oestrogen receptor immunoreactivity was restricted to the endometrium on days 0-3 of the oestrous cycle (day 0 = oestrus). In immature animals, very few scattered nuclei in the endometrium were immunoreactive. Oestrogen receptor immunoreactivity was not apparent in the endometrium during the remainder of the oestrous cycle or in this region in anoestrous animals. In pregnant ewes, oestrogen receptor immunostaining appeared as relatively few isolated nuclei in the connective tissue stroma. Progesterone receptor immunoreactivity was found in the endometrium at days 0-3 of the oestrous cycle and also in the luminal epithelium, the myometrium and the blood vessels. Progesterone receptor immunoreactivity was also found in these regions, with the exception of the endometrium, at all other stages examined. Immunostaining for c-Fos was present in the endometrium at days 0-3 of the oestrous cycle, and some scattered immunopositive nuclei were present in prepubertal animals. c-Fos immunoreactivity was also found in the myometrium and in blood vessels at all other stages examined. Visualization of c-fos gene expression by in situ hybridization showed that it occurred in the luminal epithelium and blood vessels at oestrus, but was restricted to the blood vessels in all other samples examined. (+info)Effect of progesterone on the GnRH-induced secretion of oestradiol and androstenedione from the autotransplanted ovary of the anoestrous ewe. (4/254)
Two experiments were conducted during the anoestrous period in Border Leicester x Merino ewes with ovarian autotransplants to study the effects of a single injection of 20 mg progesterone on follicular steroid secretion. The aim of these experiments was to determine whether pretreatment with a 20 mg intramuscular injection of progesterone could reduce GnRH-induced ovarian steroid secretion in anoestrous ewes. In both experiments, an injection of 150 ng GnRH induced an LH pulse in all ewes with a maximum concentration 10 min (the first post-injection sample) after injection. Oestradiol and androstenedione secretion increased progressively after the GnRH-induced LH pulse and reached maximum rates of secretion between 60 and 90 min before decreasing slowly to pre-injection rates at 150 min. There were no differences in the pattern of secretion of oestradiol (measured in both experiments) or androstenedione (measured only in Expt 2). In Expt 1, the injection of progesterone 72 h before the challenge with GnRH had no effect on the maximum rate of oestradiol secretion from the autotransplanted ovary. However, in Expt 2, when progesterone was given either 36 or 60 h before GnRH, there was a significant suppression in the maximum rate of secretion of both oestradiol and androstenedione between 60 and 90 min after GnRH injection. These data show that pretreatment of anoestrous sheep with progesterone can suppress LH-stimulated steroid secretion from the ovary and indicate that progesterone may have a direct effect on oestrogenic follicles in sheep. (+info)Interactive effects of central leptin and peripheral fuel oxidation on estrous cyclicity. (5/254)
A 48-h period of fasting inhibits estrous cycles in Syrian hamsters, and fasting-induced anestrus can be prevented by intracerebroventricular treatment with leptin during the fasting period. In the present experiment, the effects of intracerebroventricular leptin were blocked by systemic treatment with inhibitors of metabolic fuel oxidation. Leptin was infused continuously into the lateral ventricles (1 microgram/day) during fasting on days 1 and 2 of the estrous cycle. Intraperitoneal injection of 2-deoxy-D-glucose (2DG) was used to block both central and peripheral glucose oxidation, and intragastric treatment with methyl palmoxirate (MP) was used to inhibit peripheral long-chain fatty acid oxidation during the fasting and leptin-treatment period. 2DG or MP were administered at doses that did not induce anestrus in ad libitum-fed hamsters. Despite elevated central levels of leptin, fasting-induced anestrus occurred in hamsters treated with either 2DG or MP. Thus an elevated intracerebroventricular leptin concentration is not a sufficient condition for normal estrous cycles when fuel oxidation is inhibited. These results raise the possibility that central leptin influences reproduction by indirect effects on peripheral fuel metabolism. (+info)Hormonal control of urokinase plasminogen activator secretion by sheep ovarian surface epithelial cells. (6/254)
Secretion of urokinase plasminogen activator (uPA) by ovarian surface epithelium (OSE) adjacent to the preovulatory ovine follicle has been implicated in apical tissue degradation and follicular rupture. In vitro experiments were designed to test the hypothesis that uPA release by OSE is under direct hormonal control. Epithelial cells were isolated from the ovarian surface of sheep using a polytetrafluorethylene scraper designed to dislodge adherent cells from culture flasks. Amidolytic cleavage of a uPA-specific chromogen (carbobenzoxy-L-gamma-glutamyl [alpha-ot-but]-glycyl-arginine-p-nitroanilide monoacetate) was used as a measure of enzymatic bioactivity in OSE-conditioned incubation media. Secretion of uPA by OSE suspensions from proestrous ewes was stimulated by exposure (2 h) to a preovulatory surge-like concentration of LH. OSE cells obtained during the luteal phase or anestrus were not responsive to LH. Baseline rates of uPA secretion and expression of estradiol receptors (in situ immunofluorescence detection) were not affected by reproductive status. Induction of uPA secretion by anestrous OSE was attained after priming (6 h) with estradiol-17beta; responsiveness was attributed to gonadotropin receptor (ligand binding) up-regulation. Monolayers of OSE established on polyethylene membranes secreted uPA predominately in a basal (i.e., toward the substratum) direction. We suggest that OSE in juxtaposition with the (hyperemic) wall of the preovulatory follicle is perfused by surge levels of LH, invoking uPA release into underlying ovarian tissues. (+info)Ovarian function in nutritionally induced anoestrous cows: effect of exogenous gonadotrophin-releasing hormone in vivo and effect of insulin and insulin-like growth factor I in vitro. (7/254)
Ovarian function of nutritionally induced anoestrus cows was evaluated in vivo (Expt 1) and in vitro (Expt 2). In Expt 1, 32 nutritionally induced anoestrous beef cows were divided into four treatment groups receiving: (1) saline infusions at one pulse every 4 h for 13 days (control); (2) 2 micrograms GnRH at one pulse every 4 h (2 micrograms infused in 1.8 ml saline over 5 min) for 13 days (GnRH-4); (3) 2 micrograms GnRH at one pulse every 1 h for 13 days (GnRH-1); and (4) continuous infusion of 2 micrograms GnRH (a total of 2 micrograms in 34 ml h-1) for 13 days (GnRH-C). On the last day of treatment, cows were killed, ovaries were removed and follicular fluid samples (n = 149) were collected. The percentage of cows with luteal activity on day 13 was significantly different (P < 0.01) among treatments (0, 25, 75 and 25% for control, GnRH-4, GnRH-1 and GnRH-C cows, respectively). Owing to the large percentage of ovulatory cows in the GnRH-1 group (n = 6), anovulatory cows (n = 2) were removed from this treatment group for statistical analysis, as were cows with luteal tissue from the GnRH-4 (n = 2) and GnRH-C (n = 2) groups. The numbers of small (1.0-4.9 mm) and medium plus large (> or = 5 mm) follicles were not affected (P > 0.10) by treatment. However, GnRH-4 cows (n = 6) had greater (P < 0.05) concentrations of oestradiol in follicular fluid than did control (n = 8) but not GnRH-1 (n = 6) or GnRH-C (n = 6) cows. Concentrations of insulin-like growth factor I were greater (P < 0.05) in the follicular fluid of GnRH-1 cows than in all other treatment groups. Concentrations of androstenedione and progesterone in follicular fluid were not affected (P > 0.10) by treatment or follicle size. The binding activity of insulin-like growth factor binding proteins was not affected by GnRH treatment. However, the binding activity of insulin-like growth factor binding protein 2, 29-32 kDa and 22 kDa insulin-like growth factor binding proteins were greater (P < 0.05) in small versus medium plus large follicles. In Expt 2, granulosa cells were collected from nutritionally anoestrous cows to determine whether ovarian cells from anoestrous cows have the capacity to respond to insulin-like growth factor I or insulin in vitro. Both insulin-like growth factor I (20 and 200 ng ml-1) and insulin (10, 100 and 1000 ng ml-1) increased (P < 0.05) granulosa cell proliferation and progesterone production. In conclusion, pulsatile infusion of 2 micrograms GnRH (every 1 or 4 h) for 13 days into nutritionally induced anoestrous cows results in increased intrafollicular oestradiol and insulin-like growth factor I concentrations and can stimulate ovulation without markedly affecting concentrations of androstenedione or progesterone, or the binding activity of insulin-like growth factor binding proteins, in follicular fluid. In addition, granulosa cells from nutritionally induced anoestrous cows have the capacity to respond to insulin-like growth factor I and insulin in vitro, indicating that the decrease in trophic factors observed with restricted feeding does not reduce the response of the ovary to insulin-like growth factor I and insulin. (+info)Segmental aplasia of the left paramesonephric duct in the cow. (8/254)
Segmental aplasia of the left uterine horn in a multiparous Holstein cow was diagnosed by palpation and ultrasonography. Treatment with prostaglandin was unsuccessful in eliminating the fluid from the distended uterine horn. Segmental aplasia should be included in the list of differential diagnoses for cows with nonresponsive uterine enlargement. (+info)
ANESTRUS in Scrabble | Words With Friends score & ANESTRUS definition
Antioxidant Enzymes in Postpartum Anoestrus Buffaloes Supplemented with Vitamin E and Selenium | Korea Science
Growth rate of ovulatory follicles during the first ovulatory oestrus (after seasonal anoestrus) and subsequent oestrous period...
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Eazi-Breed CIDR Sheep Inserts and Applicators | Jeffers Pet
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Anoestrus Products
Hormonal Assay for Estimation of Progesterone Levels in Normally and Induced Estrus Bitches
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Horse breeding
As the days shorten, the mare returns to a period when she is not sexually receptive, known as anestrus. Anestrus - occurring ... The uterus becomes flaccid during anestrus. Cervix: the cervix starts to relax right before estrus occurs, with maximal ...
Canine reproduction
4. Anestrus is the remaining period, the time of reproductive quiescence. The female has no attraction to mating. Anestrus ...
Least weasel
Anestrus in females lasts from September until February. The female raises its kits without help from the male. They are 1.5 to ...
Progesterone devices used in farm animals
Induction of oestrus in anoestrus cows. Treatment of follicular cysts Persistent ovarian follicles Improve oocyte quality ...
Estrous cycle
Anestrus refers to the phase when the sexual cycle rests. This is typically a seasonal event and controlled by light exposure ... Anestrus is induced by time of year, pregnancy, lactation, significant illness, chronic energy deficit, and possibly age. ... Other spellings include anoestrus, anestrum, and anoestrum. After completion (or abortion) of a pregnancy, some species have ... Horses mate in spring and summer; autumn is a transition time, and anestrus occurs during winter. A feature of the fertility ...
Seasonal breeder
"Long day" breeders cycle when days get longer (spring) and are in anestrus in fall and winter. Some animals that are long day ... At other times of the year, they will be anestrus, or have a dearth of their sexual cycle. Unlike reproductive cyclicity, ... "Short day" breeders cycle when the length of daylight shortens (fall) and are in anestrus in spring and summer. The decreased ... Changes in gonadotropin secretion initiate the end of anestrus in females. Seasonal breeding readiness is strongly regulated by ...
Dog breeding
There are four stages of estrous: proestrus, estrus, diestrus, and anestrus. A dog in estrus, also known as being "in heat", ...
Peter J. Hansen
"Seasonal modulation of puberty and the postpartum anestrus in cattle: A review". Livestock Production Science. 12 (4): 309-327 ...
Gorilla
Stewart, K. J. (1988). "Suckling and lactational anoestrus in wild gorillas (Gorilla gorilla)". Journal of Reproduction and ...
Acetomepregenol
... on estrus induction in sheep in physiological anestrus. Reguliatsiia i intensifikatsiia protsessov razmnozheniia ...
Vaginal cytology
Foam cells - sometimes seen during anestrus, and are simply nondescript cells with large vacuoles. Early- to mid-proestrus - ... The final stage of estrous is anestrus, which is characterized by predominantly non-cornified squamous epithelial cells, such ...
Alfaprostol
It is also used for treating of postweaning anestrus in economically important farm animals. For these purposes, alfaprostol is ...
Domestic sheep reproduction
... during seasonal anestrus. Seasonal anestrus is when ewes do not have regular estrous cycles outside the natural breeding season ...
Horse
Most mares enter an anestrus period during the winter and thus do not cycle in this period. Foals are generally weaned from ...
Mare
As the days shorten, the mare returns to the anestrus period when she is not sexually receptive. Anestrus prevents the mare ... As the days shorten, most mares enter an anestrus period during the winter and thus do not cycle in this period. The ... Therefore, many breeding farms begin to put mares "under lights" in late winter in order to bring them out of anestrus early ...
Pseudopregnancy
The sow remains in anoestrus for prolonged periods, often as long as 115 days. These animals may exhibit varying degrees of ...
Canidae
A period of anestrus follows pregnancy or pseudo-pregnancy, there being only one oestral period during each breeding season. ...
Bovine campylobacteriosis
Adult cattle may show reproductive signs such as anoestrus, irregular oestrus patterns, agalactia, abortion, and infertility.[ ...
Rakali
They have lower reproductive output, delayed implantation, lactation anoestrus, winter anoestrus, longer estrous and longer ...
Dromedary
They are enclosed in a conical bursa and have the dimensions 4×2.5×0.5 cm (1.57×0.98×0.20 in) during anestrus. The oviducts are ...
Trisomy X
Unlike in humans, trisomy X in dogs is strongly linked to infertility, either primary anestrus or infertility with an otherwise ...
Ungulate protoparvovirus 1
Dams may return to estrus, fail to farrow despite being anestrus, farrow few pigs per litter, or farrow a large proportion of ...
Equine metabolic syndrome
... and a lack of anestrus). Horses also occasionally show anemia and elevated Gamma-glutamyl transpeptidase (GGT) levels. EMS ...
List of MeSH codes (G08)
... anestrus MeSH G08.520.188.374 - diestrus MeSH G08.520.188.500 - estrus MeSH G08.520.188.500.500 - estrus synchronization MeSH ...
Beluga whale
... and lactational anoestrus may not occur. Alloparenting (care by females different from the mother) has been observed in captive ...
Q fever
... anoestrus, silent oestrus, metritis, and decreases in milk yield when C. burnetii is the major cause of these problems. ...
Efficacy of subcutaneous administration of GnRH analogue by osmotic pump on the ending of postpartum anoestrus in dairy cattle
LH and FSH response after repeated low doses of GnRH analogue (buserelin) in treatment of anovulatory anoestrus in dairy cows. ... Ultrasound observation of ovarian dynamic after treatment of postpartum anoestrus dairy cows by GnRH and eCG. Reproduction in ... Effects of two different hormonal treatments (progesterone and GnRH+PGF2a) on the dairy cows with postpartum anoestrus. ... Postpartum anoestrus in smallholder cross-bred dairy cattle. Proceedings of the 3rd AAAP Animal Science Congress May 6-10, 1985 ...
Managing Postpartum Anestrus in Beef Cows for a Successful Breeding Season - Bill Pelton Livestock, LLC
If cows do not exhibit estrous or are still in anestrus, the chances for those females to cycle or get bred early in the ... Therefore, effective planning for reproductive health and limiting the impact of anestrus will ensure that cows are set up for ... After calving, cows go through postpartum anestrus, a period in which cows do not experience estrous cycles. During this period ...
Apical surface morphology of the mare isthmic oviduct during anoestrus and oestrus: a scanning electron microscopy study
Isthmus fragments were separated from oviducts of anoestrus (n=2, collected in November) and oestrus (n=3, one of them mated) ( ... Apical surface morphology of the mare isthmic oviduct during anoestrus and oestrus: a scanning electron microscopy study. ... Isthmus fragments were separated from oviducts of anoestrus (n=2, collected in November) and oestrus (n=3, one of them mated) ( ... The luminal epithelium of the isthmic oviduct from anoestrus and unmated oestrus mares revealed two types of cells: ciliated ...
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Bimeda, Inc. - 542534 - 05/24/2018 | FDA
Estrous Control in the Bitch - WSAVA2002 - VIN
Termination of anoestrus. The bitch is characterised by a long and obligate anoestrus. The factors regulating termination of ... to late anoestrus. This observation has been confirmed simultaneously by Jeffcoate and our laboratory examining ovarian ... progesterone contents in anoestrus. It appears clearly that ovarian progesterone content is never basal before days 130-160 of ... to increase to reach maximum values around days 20-30 and then slowly decreases to reach basal values sometime during anoestrus ...